Stable aqueous dispersion of 1, 2-benzisothiazoline-3-one (bit)

Abstract

Stable aqueous dispersion of biocidal 1,2-benzisothiazolin-3-one containing a metal salt of an organic acid, preferably potassium formate.

1 . A stable aqueous formulation comprising from 10 to 50% by weight of a microbiologically active agent containing at least 50% BIT, from 0.1 to 2.0% dispersant, and from 25 to 50% of a metal salt of a lower organic acid with a total number of carbon atoms from 1 to 5.  
     
     
         2 . A formulation as claimed in  claim 1  wherein the remainder of the formulation is water.  
     
     
         3 . A formulation as claimed in claims  1  and  2  which contains BIT as the sole microbiological agent.  
     
     
         4 . A formulation as claimed in any one of  claims 1  to  3  wherein the lower organic acid is formic acid.  
     
     
         5 . A formulation as claimed in any one of  claims 1  to  4  wherein the metal salt of a lower organic acid is potassium formate.  
     
     
         6 . A formulation as claimed in any one of  claims 1  to  5  which has a viscosity between 800 and 3000 centipoise.  
     
     
         7 . A formulation as claimed in  claim 1  which comprises by weight about 20% BIT, about 1% dispersant and about 54% potassium formate.  
     
     
         8 . A formulation as claimed in  claim 1  which comprises by weight about 45% BIT, about 1% dispersant and about 37% potassium formate.